Inelastic Scattering of Protons fromCl35andCl37

The Rice Institute 180°-magnetic spectrometer was used in measuring the energies of inelastically scattered protons from targets of normal KCl and from NaCl targets enriched in ${\mathrm{Cl}}^{35}$ and ${\mathrm{Cl}}^{37}$. Bombarding energies of 4.6, 4.7, 4.8, 5.0, and 5.6 Mev were used. One state of 1.713±0.010 Mev was observed in ${\mathrm{Cl}}^{37}$ and two states at 1.220±0.005 and 1.766±0.005 Mev are assigned to ${\mathrm{Cl}}^{35}$ for energies of excitation below 2 Mev. No state below 2.0-Mev excitation was observed in ${\mathrm{K}}^{39}$, while the first excited state of ${\mathrm{Na}}^{23}$ was determined as 437±5 kev.